Draft-damper mechanism for furnaces



H. VICK.

DRAFT DAMPER MECHANISM FOR'FURNACES.

APPLICATION FILED JULY 20, I917- Patented June 1, 1920.

2 SHEETS-SHEET I.

INVENTOR. Vick."

H. VICK'. DRAFT DAMPER MECHANISM FOR FuMMAcEs.

APPLICATION FILED JULY 20. 19M.

A v Patented June 1, 1920.

2 SHEETS-SHEET 2- HENRY VIOK, OF CHICAGE), ILLINOIS.

DRAFT-DAMPER MECHANISM FOR FURNACES.

Specification of Letters Patent.

Patented June 1,1920.

Application filed July 20, 1917. Serial No. 181,783.

To all whom it may concern:

Be it known that I, HENRY VIoK, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Draft- Damper Mechanism for Furnaces; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

Heretofore in chain grate furnaces and other types of traveling and stationary furnaces the air or draft admitted into the furnace is free to strike the grates at any and all points from below and inasmuch as there is no control over the application of the draft or air after once belng admltted into the furnace the best firing and most economical results cannot be attained.

It is an object of this invention to provide a damper mechanism by means of which the draft can be admitted to or shut off from thetraveling grate below the fire bed at any desired point. 7

It is a further objectof this inventlon to provide a damper mechanism by means of which the air or draft may be applied directly to the front only of the grate or to the front and dilferent points below the grates in varying quantities and such quantities as may be most desirable.

It is further an object of this invention to provide a damper mechanism which is simple and positive in' operation and by means of which the draft can be nicely and accurately controlled for best firing and most eflicient and economical results.

It is further an object of this invention to provide a mechanism for the purpose specified comprising a plurality of draft openings controlled by suitable means and each adapted to be controlled independently of the others or collectively as desired.

The invention (in a preferred form) consists in the matters hereinafter described and more fully pointed out in the drawings and appended claims.

On the drawings:

Figure 1 is a fragmentary longitudinal section of a furnace equipped with a damper embodying this invention.

Fig. 2. is a section taken on line 2-2 of Fig.1.

Fig. 3 is an enlarged longitudinal section of the damper. I Fig.4 is a top plan view thereof.

' As shown in said drawings:

1, indicates a furnace provided with a' suitable fire box in which travels a chain grate 2, of any suitable construction. Said furnace is provided with I-beani grate supports 3, as is usual.

Rigidly secured in said furnace below the upper traveling fire grate 2, are the damper or draft mechanisms which comprises a member, frame or casting having side walls 9, integral with which are a plurality of downwardly directed ribs or legs fl, adapted to rest on the top of the respective I-beams. Integral with the front leg 4, is a downwardly inclined lip or way 5, at the rear of which is a support or table 6, from which depends a web or wall 7. Another fiangeor web 8, connects the side walls 9, andaffords a damper space between the same and web 7. wardly from said web 8, and terminates in An inclined lip or way 10,extends upa support or table 11, from which depends a web or wall 12.

Similarly a web or wall 13, connects the side walls'9, providing a draft opening 9 I between the same and web 12, and an up- Damper doors 16, are hinged to the side ofsuch dimension as to close the draft open ng when properly'actuated.

For the purpose of actuating said damper doors a plurality of shafts 1 7, one for each set of doors, extends transversely through the furnace below the doors and are supported in any suitable bearings.

Rigidly secured to the shafts at one end thereof are arms or levers 18, to which at one end are pivotally connected rods 01' levers l920, extending outwardly through openings 21, in the front wall of the furnace and each lever is provided with teeth 22, to engage the furnace wall and hold the lever in any adjustment.

Secured on said shafts 17, below the respective damper doors are arms or levers 23, adapted to contact said doors and integral with each lever 23, is a weight 24.

walls 9, in any suitable manner and are The operation is as follows:

The device is described as a casting but obviously may be made up in any suitable manner and is inserted in the furnace with its legs resting on the I-beams 3.7

If it is desired to prevent the admission of'all draft to the bottom of the grate back of the front both doors are closed by actuating the proper lever 19 or 20, which in turn swings the levers 23, to press the doors firmly shut and the weights 24 act as counterweights to aid the levers 23, in firmly holding said doors shut. I

It is of course obvious that any set of doors may be opened independent of the others to admit draft at different points or the doors of the different sets may be opened various distances to admit a variable draft in any quantity to best suit the particular conditions arising.

The supports or tablesv 61115 are adapted to support the grate bars thereon while traveling thereover to firmly hold the grate in position underweight of the fuel thereon and prevents the grate from sagging or cramplng.

It will be noticed that the front draft doors may be opened independently of the other doors and vice versa or both sets may be opened together so that the draft may be regulated to a nicety for obtaining best results I While. I have shown the particular construction above set forth it is obvious that many details of construction may be varied and Itherefore do not desire to limit the patent, when issued, otherwise than necessitated by the prior art.

, comprising a member adapted to be secured I claim as my invention:

1. A damper, for traveling furnace grates,

below the upper lapof the grateand having draft openings therein, doors for closing and opening said openings, and counter weighted means for holding said doors in closed position.

2. The combination with a traveling furv nace grate, of a damper associated therewith comprising a frame having openings thereoperating means adapted to assist in holding saiddoors closed.

4;. A furnace damper embracing a unitary frame having draft openings therein, doors for closing said openings for controlling the draft therethrough, counterweighted mem- V bers for holding said doors closed, means connected with said members for operating the same and said doors independently of one another, and means for holding said operating means in an adjusted position.

5. In a draft device of the class described, a casting having openings therein, inclined members integral with said casting, grate supports integral with said inclined members and extending rearwardly therefrom,

damper doors for controlling the draft g i through said openings, and welghted levers for holding said doors in closed position.

6. In a damper mechanism of the class described, a casting'having openings therein,

doors pivoted thereon for controlling said openings, counterweighted means for holding said doors in closed position to close said openings, and mechanisms foradjusting said doors independently of one another for varying the draft throu hsaid openings.

In testimony whereof have hereunto subscribed my name in the presence of two subscribing witnesses.

I HENRYVIOK.

, Witnesses:

CHARLES W. HILLS, Jr., EARL M. HARDINE. 

